This is a Pro only feature.
The DWG/DXF Hidden Line Option dialog box contains options for exporting 2D DWG and DXF Files.
Drawing Scale & Size
The Drawing Scale & Size section of the DWG/DXF Hidden Options dialog box contains scaling options for your model.
Full Scale (1:1)
The Full Scale (1:1) option is used to set your output to a 1:1 (real world) scale.
In Drawing/In Model
The In Drawing/In Model fields are used to scale your model for export. The first measurement, labeled In the Model, is the measurement of the exported geometry. The second measurement, labeled In Drawing, is the actual measurement
of the object in real scale. For example, for a scale of 1/4" = 1', simply enter 1 inch 'In Model' equals 4 feet 'In Drawing.'
Width/Height
The width and height fields are used to enter a custom page size for your file.
AutoCAD Version
The AutoCAD section of the AutoCAD DWG/DXF Export Options dialog box is used to select the version of exported DWG/DXF file.
Profile Lines
The Profile Lines section of the DWG/DXF Hidden Option dialog box contains options for exporting profile lines.
None
The None option is used to export profile lines at standard width.
Polylines with width
The Polylines with width option is used to export profile lines as AutoCAD polyline entities.
Wide line entities
The Wide line entities option is used to export profile lines as AutoCAD wide line entities. This option is only available when saving AutoCAD 2000 or later DWG files.
Separate on a layer
The Separate on a layer option is used to output profile lines onto their own layer. This option is useful if you would like to plot profile lines using a different pen weight or quickly change the line width of all profile lines in a separate CAD or Illustration program.
Width
The Width field is used to specify an exact width for the Polylines with width option. This option is only available when Polylines with width is checked and Automatic is unchecked.
Automatic
The Automatic option is used to set the width of profile lines by matching the output to the proportions you see in the SketchUp drawing area. This option is only available when 'Polylines with width' is checked.
Section Lines
The Section Lines section of the DWG/DXF Hidden Options dialog box contains options for exporting section lines.
None
The None option is used to export section slice lines at standard width.
Polylines with width
The Polylines with option is used to export section slice lines as AutoCAD polyline entities.
Wide line entities
The Wide line entities option is used to export section slice lines as AutoCAD wide line entities. This option is only available when saving AutoCAD 2000 or later DWG files.
Separate on a layer
The Separate on a layer option is used to output section slice lines onto their own layer. This option is useful if you would like to plot section slice lines using a different pen weight or quickly change the line width of all section slice lines in a separate CAD or Illustration program.
Width
The Width field is used to specify an exact width for the Polylines with width option. This option is only available when Polylines with width is checked and Automatic is unchecked.
Automatic
The Automatic option is used to set the width of section slice lines by matching the output to the proportions you see in the SketchUp drawing area. This option is only available when 'Polylines with width' is checked.
Extension Lines
The Extension Lines section of the DWG/DXF Hidden Options dialog box contains options for exporting extension lines.
Show extensions
Some CAD applications might have problems recognizing endpoints and intersections of lines with SketchUp extensions. The show extensions option is used to toggle the export of line extensions.
Length
The Length field is used to specify an exact length for line extensions. This option is only available when 'Show extensions' is checked and 'Automatic' is unchecked.
Automatic
The Automatic option is used to set the length of extension lines by matching the output to the proportions you see in the SketchUp drawing area. This option is only available when Show extensions is checked.
Always Prompt for Hidden Line Options
The Always Prompt for Hidden Line Options is used to automatically display the Hidden Line Options dialog box when you export a 2D DWG or DXF file.
Defaults
The Defaults button is used to return the items in the Hidden Line Options dialog box to the default settings.